UNITED NATIONS - UN Secretary General Ban Ki-moon Monday urged state parties to the Nuclear Non-proliferation Treaty (NPT) to conclude their month-long conference with an agreement on nuclear disarmament, non-proliferation and the peaceful use of nuclear energy. The NPT review conference entered its fourth week of talks at UN headquarters in New York and is scheduled to end Friday with a final document upholding nuclear disarmament. India, Pakistan and Israel are not parties to the 1968 treaty that seeks to control the spread of nuclear weapons. As expected, there have been divergent views, Ban said. Yet the will to succeed has been clear. Many constructive proposals have been put on the table covering all three NPT pillars. He said the talks have reached a crucial stage and it would be time for an agreement, urging the parties not to repeat the failure of the last review meeting held in 2005. I urge delegations to be pragmatic, to abandon rhetoric, and to look beyond narrow national interest, Ban said. The world is watching. People want a safer world - a world free of nuclear weapons, a world in which they dont have to worry about nuclear proliferation and nuclear terrorism. The 189 NPT parties had spent two weeks of discussion behind closed doors following the high-profile public opening on May 3, which Iranian President Mahmoud Ahmadinejad attended as the sole head of state to defend his nations controversial nuclear programme. Other governments sent foreign ministers, including US Secretary of State Hillary Rodham Clinton. The review conference was called to strengthen the treaty by upholding the three pillars of nuclear disarmament, non-proliferation and peaceful uses of nuclear energy. The treaty has called on nuclear powers to agree to total nuclear disarmament. But the worlds five recognized nuclear powers - the United States, Russia, China, France and Britain - have not met that demand. There are an estimated 23,000 nuclear warheads in the world.